Specifications:
Screw diameter: 15mm-300mm
L/D Ratio: 10-56
Materials:
38CrMoAlA, 6470E, En41B, 38XMHOA, 34CrAlMoS1.8507, 45CAD6-12, SACM1.
Spray Coating Bimetallic-alloy Materials:
(1)Carbide + Alloy
(2)88Wc/12Co
(3)CrC-NiCr
(4)Ni60
Processing Technology:
Heat treatment, Nitriding treatment, High-frequency hardening, Spray coating bimetallic-alloy, Vacuum quenching.
Types Of Extruder Screw:
Gradient-type, Mutant-type, Wave-type, Shielding-type, Double shielding-type, Conical-type, Shunt-type, Separation-type, Exhaust-type, Pin-type, Mixing-type, etc.

Nitriding depth: 0.4-0.7mm
Nitriding hardness: 850-1020Hv
Nitriding brittleness: Less than grade one
Screw straightness: 0.015mm
The surface hard chromium plating hardness: bigger than 850Hv
Hardness of alloy: HRC 62 degree
Chromium-plating layer thickness: 0.03mm-0.08mm
Depth of alloy: deeper than 2mm